Information processing device, information processing method, and non-transitory computer readable medium

ABSTRACT

An information processing device includes a selection receiving unit that receives an input indicating selection of at least one countermeasure among a plurality of countermeasures applicable to a terminal, an operating information specifying unit that specifies a type of operating information corresponding to the countermeasure applicable to the terminal, an operating information acquisition unit that acquires operating information of the type specified by the operating information specifying unit, a remaining terminal specifying unit that specifies remaining terminals where a security risk remains when the countermeasure received by the selection receiving unit is applied based on terminal-specific countermeasure information indicating a countermeasure applicable to each terminal against the security risk, a prediction unit that predicts the number of remaining terminals at a future time based on the operating information acquired by the operating information acquisition unit, and a presentation unit that presents prediction results predicted by the prediction unit.

TECHNICAL FIELD

The present invention relates to an information processing device, aninformation processing method, and a non-transitory computer readablemedium.

BACKGROUND ART

Terminals on a network are subject to security risks such asvulnerabilities in hardware or software and threats caused by externalattacks. In general, there are several countermeasures that can be takenagainst a security risk.

However, countermeasures other than applying patches againstvulnerabilities cannot be applied to all terminals because transmissionlimitations, configuration changes and the like differ from terminal toterminal. Thus, in the case of taking countermeasures on a large numberof terminals, high costs have been needed to develop thecountermeasures.

In view of the foregoing, inventions that support the development ofcountermeasures against (how to deal with) security risks in eachterminal have been proposed recently. For example, Patent Literature 1discloses an invention that analyzes a security risk based on the stateof a system in operation and presents the most appropriatecountermeasure among possible countermeasures for reducing the securityrisk in consideration of various constraints imposed on the system inoperation.

CITATION LIST Patent Literature

PTL1: Japanese Patent No. 5304243

SUMMARY OF INVENTION Technical Problem

As described above, the invention disclosed in Patent Literature 1presents the most appropriate countermeasure when there is a securityrisk in a terminal. However, because effects on the terminal and thesystem caused by applying the proposed countermeasure are unknown, asecurity administrator has not been able to determine whether to applythe proposed countermeasure immediately and, when a plurality ofcountermeasures are proposed, which of them is the most appropriate.Therefore, it has been difficult for a security administrator to developcountermeasures against security risks.

An exemplary object of the present invention is to provide a techniqueto solve the above problem.

Solution to Problem

According to one exemplary aspect of the present invention, aninformation processing device includes a selection receiving unitconfigured to receive an input indicating selection of at least onecountermeasure among a plurality of countermeasures applicable to aterminal with a security risk, an operating information specifying unitconfigured to specify a type of operating information corresponding to acountermeasure applicable to the terminal by using terminal-specificcountermeasure information indicating a countermeasure applicable toeach terminal against the security risk and definition informationdefining correspondence between a type of operating information of theterminal and a countermeasure against the security risk, an operatinginformation acquisition unit configured to acquire operating informationof the type specified by the operating information specifying unit amongthe operating information of the terminal, a remaining terminalspecifying unit configured to specify remaining terminals where thesecurity risk remains when the countermeasure received by the selectionreceiving unit is applied based on the terminal-specific countermeasureinformation, a prediction unit configured to predict the number of theremaining terminals at a future time based on the operating informationacquired by the operating information acquisition unit, and apresentation unit configured to present prediction results predicted bythe prediction unit.

According to one exemplary aspect of the present invention, aninformation processing method is an information processing methodperformed by an information processing device, the method including astep of receiving an input indicating selection of at least onecountermeasure among a plurality of countermeasures applicable to aterminal with a security risk, a step of specifying a type of operatinginformation corresponding to a countermeasure applicable to the terminalby using terminal-specific countermeasure information indicating acountermeasure applicable to each terminal against the security risk anddefinition information defining correspondence between a type ofoperating information of the terminal and a countermeasure against thesecurity risk, a step of acquiring operating information of thespecified type among the operating information of the terminal, a stepof specifying remaining terminals where the security risk remains whenthe received countermeasure is applied based on the terminal-specificcountermeasure information, a step of predicting the number of theremaining terminals at a future time based on the acquired operatinginformation, and a step of presenting the predicted results.

According to one exemplary aspect of the present invention, anon-transitory computer readable medium stores a program causing acomputer to execute a step of receiving an input indicating selection ofat least one countermeasure among a plurality of countermeasuresapplicable to a terminal with a security risk, a step of specifying atype of operating information corresponding to a countermeasureapplicable to the terminal by using terminal-specific countermeasureinformation indicating a countermeasure applicable to each terminalagainst the security risk and definition information definingcorrespondence between a type of operating information of the terminaland a countermeasure against the security risk, a step of acquiringoperating information of the specified type among the operatinginformation of the terminal, a step of specifying remaining terminalswhere the security risk remains when the received countermeasure isapplied based on the terminal-specific countermeasure information, astep of predicting the number of the remaining terminals at a futuretime based on the acquired operating information, and a step ofpresenting the predicted results.

Advantageous Effects of Invention

According to the exemplary aspects of the present invention, a securityadministrator can easily develop countermeasures against security risks.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a view conceptually showing the processing configuration of aninformation processing device according to a first embodiment.

FIG. 2 is a view showing an example of a screen generated by theinformation processing device according to the first embodiment.

FIG. 3 is a view showing an example of terminal-specific countermeasureinformation according to the first and second embodiments.

FIG. 4 is a view showing an example of definition information accordingto the first and second embodiments.

FIG. 5 is a view showing an example of operating information accordingto the first and second embodiments.

FIG. 6 is a view showing an example of prediction results predicated bya predication unit according to the first embodiment.

FIG. 7 is a view showing an example of a screen presented by apresentation unit according to the first embodiment.

FIG. 8 is a view showing another example of a screen presented by thepresentation unit according to the first embodiment.

FIG. 9 is a view conceptually showing the hardware configuration of theinformation processing device according to the first embodiment.

FIG. 10 is a flowchart showing the process flow of the informationprocessing device according to the first embodiment.

FIG. 11 is a view conceptually showing the system configuration of aninformation processing system according to a second embodiment.

FIG. 12 is a view showing an example of terminal information acquired byan information acquisition unit according to the second embodiment.

FIG. 13 is a view showing an example of classification informationstored by a classification information storage unit according to thesecond embodiment.

FIG. 14 is a view showing an example of a screen generated by a displayprocessing unit according to the second embodiment.

FIG. 15 is a view showing an example of prediction results predicated bya predication unit according to the second embodiment.

FIG. 16 is a view showing an example of a screen presented by apresentation unit according to the second embodiment.

FIG. 17 is a view showing another example of a screen presented by thepresentation unit according to the second embodiment.

FIG. 18 is a flowchart showing the process flow of the informationprocessing device according to the second embodiment.

DESCRIPTION OF EMBODIMENTS

Exemplary embodiments of the present invention will be describedhereinafter with reference to the drawings. Note that, in the figures,the identical reference symbols denote identical structural elements andthe redundant explanation thereof is omitted as appropriate.

First Embodiment [Processing Configuration]

FIG. 1 is a view conceptually showing the processing configuration of aninformation processing device 10 according to a first embodiment. Asshown in FIG. 1, the information processing device 10 according to thefirst embodiment includes a selection receiving unit 110, an operatinginformation specifying unit 120, an operating information acquisitionunit 130, a remaining terminal specifying unit 140, a prediction unit150, and a presentation unit 160.

The selection receiving unit 110 receives an input indicating that atleast one countermeasure is selected from a plurality of countermeasuresthat are applicable to a terminal to be managed having security risks.Security risks include vulnerabilities in a terminal to be managed orthreats caused by external attacks to a terminal to be managed. Aterminal to be managed is a terminal connected to the informationprocessing device 10 through a network, whose security state ismonitored. A terminal to be managed is not only communication equipmentsuch as a client terminal, a server, a switch or a router on a networkbut also everything with a function of connecting to a network or ameans of communicating through a network (so-called IoT (Internet ofThings). A countermeasure is an action to be taken to resolve, preventor reduce vulnerabilities and threats, and an applicable countermeasureis an action that can be taken on a terminal to be managed among actionsagainst vulnerabilities and threats. The selection receiving unit 110receives an input for selecting a countermeasure against a security risk(vulnerability A in this example) through a screen shown in FIG. 2, forexample.

FIG. 2 is a view showing an example of a screen that is generated by theinformation processing device 10 and displayed on a display device (notshown) connected to the information processing device 10. Note that FIG.2 is an example of a screen in the case where the security risk is avulnerability A. The screen of FIG. 2 displays the number of terminalsto be managed having the vulnerability A (“at risk”), the number ofremaining risks after countermeasure (the number of terminals to bemanaged in which the vulnerability A remains) if each countermeasure istaken (“remaining risks after countermeasure”), a predicted value ofremaining risks at a future time (after one week in this example)(“remaining risk predicted value”), and each of countermeasures againstthe vulnerability A (“countermeasure (1)”, “countermeasure (2)” and“countermeasure (3)”) in association with one another. A figure inparentheses in a field in a row of each countermeasure indicates thenumber of terminals to be managed to which a countermeasurecorresponding to this row is applicable. The screen of FIG. 2 alsodisplays the overview of the vulnerability A and a description of eachcountermeasure against the vulnerability A. The screen example of FIG. 2shows that, among 90 terminals to be managed having the vulnerability A,“countermeasure (1)” can be applied to 28 terminals, “countermeasure(2)” can be applied to 69 terminals, and “countermeasure (3)” can beapplied to 15 terminals. Note that the sum of the terminals to bemanaged corresponding to the respective countermeasures is differentfrom the number of terminals (90) as a parameter because there areterminals to be managed to which a plurality of countermeasures areapplicable. Further, in the screen of FIG. 2, by clicking on the blackdownward triangle at “remaining risk predicted value”, a drop-down listof choices for a future time (e.g., immediately, next day, after oneweek, after one month etc.) is displayed. When a certain future time isselected from the drop-down list, a predicted value at the selectedfuture time (after one week in this example) is displayed in theremaining risk predicted value.

The screen of FIG. 2 is generated by the information processing device10 based on information indicating countermeasures against thevulnerability A which are applicable to each terminal to be managed(terminal-specific countermeasure information) as shown in FIG. 3, forexample. FIG. 3 is a view showing an example of the terminal-specificcountermeasure information. Note that FIG. 3 shows an example of theterminal-specific countermeasure information in the case where thesecurity risk is the vulnerability A. The terminal-specificcountermeasure information contains terminal identification information(e.g., MAC (Media Access Control) address etc.) that identifies eachterminal to be managed and information indicating countermeasuresapplicable to each terminal to be managed. The terminal-specificcountermeasure information is generated by checking on terminals to bemanaged in advance based on information (risk information) indicatingsecurity risks, their countermeasures and the like which is providedfrom each vendor, for example, and stored into a specified storage unit(not shown). In the example of FIG. 3, against the vulnerability A,“countermeasure (1)” and “countermeasure (3)” are applicable to theterminal A, “countermeasure (2)” is applicable to the terminal B, and“countermeasure (3)” is applicable to the terminal C. A storage unit tostore the terminal-specific countermeasure information as shown in FIG.3 may be included in the information processing device 10, or may beincluded in another device that is connected for communication with theinformation processing device 10.

The remaining terminal specifying unit 140 reads the terminal-specificcountermeasure information from a specified storage unit (not shown)and, based on the read terminal-specific countermeasure information,specifies terminals to be managed in which the security risk remains(which are hereinafter referred to also as remaining terminals) if thecountermeasure indicated by the selection input received by thecountermeasure is taken. As described above, the terminal-specificcountermeasure information is information indicating countermeasuresapplicable to each terminal to be managed against a security risk, andit is stored in a storage unit in the format as shown in FIG. 3. Theremaining terminal specifying unit 140 can specify terminals to bemanaged to which the countermeasure indicated by the selection input isapplicable based on the correspondence between terminal identificationinformation and applicable countermeasures in the terminal-specificcountermeasure information as shown in FIG. 3. At the same time, theremaining terminal specifying unit 140 can specify terminals to bemanaged in which the security risk remains (remaining terminals).

The operating information specifying unit 120 specifies the type ofoperating information corresponding to countermeasures applicable toterminals to be managed by using the above-described terminal-specificcountermeasure information and definition information that defines thecorrespondence between the type of operating information of a terminalto be managed and a countermeasure against a security risk. Theoperating information is information containing at least one ofinformation indicating a history of operations and processing actuallyperformed in a terminal to be managed (operating history information)and information indicating operations and processing scheduled to beperformed in a management device (operating schedule information). Suchoperating information is generated in each terminal to be managed inresponse to input of an execution of a specified operation or processingor input of an execution schedule of a specified operation or processingin each terminal to be managed, and stored into a storage unit of thisterminal to be managed. Further, “type of operating information” means acategory to which each operating information belongs. Specific examplesof “type of operating history information” include “patch applicationhistory”, “restart history”, “continuous operating time”, “port usagehistory”, “process operating history”, “application usage history” andthe like. Further, specific examples of “type of operating scheduleinformation” include “scheduled patch application date and time”,“scheduled restart date and time”, “scheduled application start date andtime” and the like. Note that, however, the type of operatinginformation is not limited to those examples.

The definition information is stored in a specified storage unit (notshown) in the format as shown in FIG. 4, for example. FIG. 4 is a viewshowing an example of the definition information. Note that FIG. 4 is anexample of the definition information in the case where the securityrisk is the vulnerability A. In FIG. 4, a countermeasure against thevulnerability A (“countermeasure (1)”, “countermeasure (2)”,“countermeasure (3)”) and the type of operating information of aterminal to be managed, which is used as a reference to determinewhether or not to apply this countermeasure, are stored in associationwith each other. In the example of FIG. 4, “countermeasure (1)” is acountermeasure that applies a patch AAAA and restarts. “Countermeasure(2)” is a countermeasure that stops a process ZZZZ. “Countermeasure (3)”is a countermeasure that blocks a port 1027. Further, “type of operatinginformation” corresponding to “countermeasure (1)” is “patch applicationhistory”, “restart history” and “continuous operating time”. “Type ofoperating information” corresponding to “countermeasure (2)” is “usagehistory of process ZZZZ”. “Type of operating information” correspondingto “countermeasure (3)” is “usage history of port 1027”. A storage unitto store the definition information as shown in FIG. 4 may be includedin the information processing device 10, or may be included in anotherdevice that is connected for communication with the informationprocessing device 10.

The operating information specifying unit 120 specifies an applicablecountermeasure and the type of operating information corresponding tothis countermeasure for each terminal to be managed based on theterminal-specific countermeasure information in FIG. 3 and thedefinition information in FIG. 4, for example. To be specific, based onthe terminal-specific countermeasure information in FIG. 3, theoperating information specifying unit 120 specifies that, against thevulnerability A, “countermeasure (1)” and “countermeasure (3)” areapplicable to the terminal A. Then, based on the definition informationin FIG. 4, the operating information specifying unit 120 specifies “typeof operating information” corresponding to “countermeasure (1)” as“patch application history”, “restart history” and “continuous operatingtime”. Further, based on the definition information in FIG. 4, theoperating information specifying unit 120 specifies “type of operatinginformation” corresponding to “countermeasure (3)” as “usage history ofport 1027”. Regarding the terminal B also, just like in the case of theterminal A, the operating information specifying unit 120 specifies anapplicable countermeasure (only “countermeasure (2)”) and the type ofoperating information corresponding to it (“usage history of processZZZZ”).

The operating information acquisition unit 130 acquires the operatinginformation of the type specified by the operating informationspecifying unit 120. The operating information acquisition unit 130acquires the operating information of the type specified by theoperating information specifying unit 120 from the operating informationof a terminal to be managed by the following way, for example.

The operating information acquisition unit 130 notifies a terminal to bemanaged of the type of operating information specified by the operatinginformation specifying unit 120, and receives the operating informationof this type as a response from the terminal to be managed, for example.Alternatively, the operating information acquisition unit 130 mayacquire the operating information stored in a terminal to be managed,and extract the operating information of the type specified by theoperating information specifying unit 120 from the acquired information.The operating information acquisition unit 130 may acquire necessaryoperating information from all of the operating information stored in aterminal to be managed, or may acquire necessary operating informationfrom the operating information within a specified period of time (e.g.,for one month) stored in a terminal to be managed. An example of theoperating information may contain information about an operating historywithin a past specified period of time (e.g., for one month in the pastetc.), which is information about restart performed in the past,information about a port number accessed in the past, and informationabout a process carried out in the past. Another example of theoperating information may contain information about an operatingschedule for a future specified period of time (e.g., for one month inthe future etc.), which is information about restart scheduled to beperformed in the future, information about a port number scheduled to beaccessed in the future, and information about a process scheduled to becarried out in the future. Further, the operating information may be acombination of them. When there is a subsystem that manages a terminalto be managed, a future operating schedule may be acquired from thissubsystem.

To be specific, the operating information acquisition unit 130 acquiresthe operating information as shown in FIG. 5. FIG. 5 is a view showingan example of the operating information acquired by the operatinginformation acquisition unit 130. Note that FIG. 5 is an example of theoperating information in the case where the security risk is thevulnerability A. The operating information acquisition unit 130 acquiresthe operating information of “patch application history”, “restarthistory” and “continuous operating time” from the terminal A for“countermeasure (1)”, which is applicable to the terminal A, based onthe type of the operating information specified by the operatinginformation specifying unit 120. Further, the operating informationacquisition unit 130 acquires the operating information of “usagehistory of port 1027” from the terminal A for “countermeasure (3)”,which is applicable to the terminal A, based on the type of theoperating information specified by the operating information specifyingunit 120. Regarding the terminal B, just like in the case of theterminal A, the operating information acquisition unit 130 also acquiresthe operating information of “usage history of process ZZZZ” from theterminal B for “countermeasure (2)”, which is applicable to the terminalB. When the operating information relates to the past operating history,the date of the operating information is in the past. When, on the otherhand, the operating information relates to the future operatingschedule, the date of the operating information is in the future.

The prediction unit 150 predicts the number of terminals to be managedin which the security risk remains (remaining terminals) at future timesbased on the operating information acquired by the operating informationacquisition unit 130. For example, according to the operatinginformation shown in FIG. 5, the prediction unit 150 can make thefollowing predictions about the terminal A (it is assumed in thisexample that the prediction unit 150 checks the operating information ofin FIG. 5 on Wednesday, May 27, 2015). The prediction unit 150 candetermine the periodic restart timing by referring to “restart history”associated with “countermeasure (1)”. In the case where the field of“restart schedule” is placed together with the field of “restarthistory” or instead of the field of “restart history”, and informationabout a schedule of future restart is stored in the field of “restartschedule”, the restart timing can be determined by referring to “restartschedule”. For example, the prediction unit 150 may predict or determinethe restart schedule with the closest scheduled date and time as therestart timing. Further, the prediction unit 150 can determine theperiodic patch application timing by referring to “patch applicationhistory” associated with “countermeasure (1)”. To be specific, in theterminal A, a patch was applied and the terminal A was restartedperiodically in the morning every Thursday. Based on this information,the prediction unit 150 can predict the timing to apply “countermeasure(1)”, which is, the timing to apply a patch AAAA and restart, as “in themorning next Thursday”, i.e., “in the morning on Thursday, May 28,2015”. This is because, according to the past restart history, restartwas performed at 10 o'clock every Thursday three times in the past, outof all three times occurred in the past, and it is predictable that thenext restart will be performed also at 10 o'clock on Thursday based onthis periodicity. In another method, the number of times of restart maybe counted for each day of week, and it may be predicted that restart ismore likely to be performed on a day of the week when the counted numberis larger. Further, the prediction unit 150 can determine the usagehistory of the port 1027 by referring to “usage history of port 1027”associated with “countermeasure (3)”. To be specific, regarding theterminal A, the port 1027 was used two days in succession, i.e., twodays and one day before. In this manner, when information about aplurality of usage dates is stored in “usage history of port 1027”, theprediction unit 150 may determine that the port 1027 is likely to beused again, and set the timing to apply “countermeasure (3)”, which isthe timing to block the port 1027, as the timing after a specifiednumber of days, which is set rather long, have passed. Alternatively,regarding the terminal A, the prediction unit 150 may determine not topredict a date for “countermeasure (3)”; in other words, may determinenot to apply “countermeasure (3)” to the terminal A. In the firstembodiment, the prediction unit 150 predicts the timing to block theport 1027 at the timing after a specified number of days, which is setrather long, have passed, e.g., “Wednesday, Jun. 3, 2015”, which isafter one week, as in the former case. Note that the specified number ofdays may be a predetermined number of days. In this manner, by referringto the operating information corresponding to a countermeasure, theprediction unit 150 can easily predict the timing to take thecountermeasure.

The prediction unit 150 predicts the timing to apply applicablecountermeasures in the above way for terminals to be managed other thanthe remaining terminals specified by the remaining terminal specifyingunit 140. To be specific, for each of terminals to be managed other thanthe remaining terminals, the prediction unit 150 specifies applicablecountermeasures based on the terminal-specific countermeasureinformation in FIG. 3 and predicts the timing to apply the applicablecountermeasures based on the operating information in FIG. 5. Theprediction unit 150 assumes that, for each of terminals to be managedother than the remaining terminals, the applicable countermeasure istaken at the predicted application timing, and the vulnerability A iseliminated. For example, regarding the terminal A, the timing to apply“countermeasure (1)” is predicated as “in the morning on Thursday, May28, 2015”, and the timing to apply “countermeasure (3)” is predicated as“on Wednesday, Jun. 3, 2015” as described above. Thus, the predictionunit 150 assumes that, in the terminal A, the vulnerability A iseliminated “in the morning on Thursday, May 28, 2015”, which is theearlier date. Based on such assumption, the prediction unit 150 countsthe number of terminals to be managed (remaining terminals) in which thevulnerability A remains at each future time (e.g., immediately, nextday, after one week, after one month etc.) in chronological order up toa future time at which the number of remaining terminals becomes equalto or less than a specified number (e.g., 0), and uses this countedvalue as a predicted value of the number of remaining risks (terminalsto be managed in which the vulnerability A remains). FIG. 6 is a viewshowing an example of prediction results predicted by the predictionunit 150. Note that FIG. 6 shows an example of prediction results in thecase where the security risk is the vulnerability A. The predictionresults of FIG. 6 are results when the selection receiving unit 110receives an input indicating selection of “countermeasure (1)”,“countermeasure (2)” and “countermeasure (3)”. The example of FIG. 6 isan example where the specified number is 0, and the prediction unit 150predicts the number of remaining terminals in chronological order up to“after three months” when the number of remaining terminals becomes 0 orless. To be specific, in the example of FIG. 6, the number of remainingterminals is predicted to be 22 “after immediate execution”, 13 on the“next day”, 6 “after one week”, 2 “after one month”, and 0 “after threemonths”.

The presentation unit 160 presents the prediction results predicted bythe prediction unit 150 on a display device (not shown) or the likeconnected to the information processing device 10, for example. Forexample, as shown in FIG. 7, the presentation unit 160 reflects, on thescreen of FIG. 2, the prediction results predicted by the predictionunit 150 (“remaining risk predicted value”) and results of counting thenumber of remaining terminals specified by the remaining terminalspecifying unit 140 (“remaining risks after countermeasure”). FIG. 7 isa view showing an example of a screen presented by the presentation unit160. Note that FIG. 7 is an example of a screen in the case where thesecurity risk is the vulnerability A. FIG. 7 illustrates a screen whenall of “countermeasure (1)”, “countermeasure (2)” and “countermeasure(3)” are selected on the screen of FIG. 2. On the screen of FIG. 7,“after one week” is selected in the drop-down list of “remaining riskpredicted value”. Thus, “remaining risk predicted value” “after oneweek” is displayed. Note that, however, when another future time isselected, “remaining risk predicted value” at the selected future time(e.g., “next day”) is displays. In this way, when a countermeasureagainst the security risk is selected on a screen presented by theinformation processing device 10, results if this countermeasure istaken is shown on the screen.

Alternatively, the presentation unit 160 may display a screen showing agraph of “remaining risk predicted value” at each future time inchronological order as shown in FIG. 8, instead of the screen of FIG. 7.FIG. 8 is a view showing another example of a screen presented by thepresentation unit 160. Note that FIG. 8 is an example of a screen in thecase where the security risk is the vulnerability A. Further, althoughFIG. 8 displays the number of remaining risks (terminals to be managedin which the vulnerability A remains) at the present time also, whetheror not to display the number of remaining risks at the present time isnot particularly limited.

[Hardware Configuration]

FIG. 9 is a view conceptually showing the hardware configuration of theinformation processing device 10 according to the first embodiment. Asshown in FIG. 9, the information processing device 10 according to thefirst embodiment includes a processor 101, a memory 102, a storage 103,an input/output interface (input/output I/F) 1004, a communicationinterface (communication I/F) 105 and the like, and it is implemented bya computer, for example. The processor 101, the memory 102, the storage103, the input/output interface 104 and the communication interface 105are connected through a data transmission line for transmitting andreceiving data to and from one another.

The processor 101 is a processing unit such as CPU (Central ProcessingUnit) or GPU (Graphics Processing Unit). The memory 102 is a memory suchas RAM (Random Access Memory) or ROM (Read Only Memory). The storage 103is a storage device such as HDD (Hard Disk Drive), SSD (Solid StateDrive) or memory card. Alternatively, the storage 103 may be a memorysuch as RAM or ROM.

The storage 103 stores a program for implementing the function of eachprocessing unit (the selection receiving unit 110, the operatinginformation specifying unit 120, the operating information acquisitionunit 130, the remaining terminal specifying unit 140, the predictionunit 150, the presentation unit 160 etc.) included in the informationprocessing device 10. The processor 101 executes each program andthereby implements the function of each processing unit. The processor101 may execute each program after reading the program onto the memory102, or may execute each program without reading it onto the memory 102.

The above-described program can be stored and provided to the computerusing any type of non-transitory computer readable medium. Thenon-transitory computer readable medium includes any type of tangiblestorage medium. Examples of the non-transitory computer readable mediuminclude magnetic storage media (such as floppy disks, magnetic tapes,hard disk drives, etc.), optical magnetic storage media (e.g.magneto-optical disks), CD-ROM (Compact Disc-Read Only Memory), CD-R(CD-Recordable), CD-R/W (CD-ReWritable), and semiconductor memories(such as mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flashROM, RAM (Random Access Memory), etc.). The program may be provided to acomputer using any type of transitory computer readable medium. Examplesof the transitory computer readable medium include electric signals,optical signals, and electromagnetic waves. The transitory computerreadable medium can provide the program to a computer via a wiredcommunication line such as an electric wire or optical fiber or awireless communication line.

The input/output interface 104 is connected with a display device 1041,an input device 1042 and the like. The display device 1041 is a devicethat displays a screen corresponding to drawing data processed by theprocessor 101, such as LCD (Liquid Crystal Display) or CRT (Cathode RayTube) display. The input device 1042 is a device that receives anoperation input by an operator, such as a keyboard, a mouse or a touchsensor, for example. The display device 1041 and the input device 1042may be integrated and implemented as a touch panel.

The communication interface 105 transmits and receives data to and froman external device. For example, the communication interface 105communicates with an external device through a wired or wirelessnetwork.

Note that the hardware configuration of the information processingdevice 10 is not limited to the configuration shown in FIG. 9.

Operation Example

An operation example of the information processing device 10 accordingto the first embodiment is described hereinafter with reference to FIG.10. FIG. 10 is a flowchart showing the process flow of the informationprocessing device 10 according to the first embodiment. An operationexample in the case where the security risk is the vulnerability A isdescribed hereinbelow.

First, the selection receiving unit 110 receives an input from asecurity administrator through the screen as shown in FIG. 2 (S101). Theinput from a security administrator is an input that selects at leastone countermeasure among a plurality of countermeasures against thevulnerability A presented on the screen.

Next, the remaining terminal specifying unit 140 specifies the remainingterminals in which the vulnerability A remains by referring to a storageunit that stores the terminal-specific countermeasure information, usingthe countermeasure indicated by the input received by the selectionreceiving unit 110 as a key (S102). For example, it is assumed that thestorage unit stores the terminal-specific countermeasure information inFIG. 3, and the selection receiving unit 110 receives an inputindicating selection of “countermeasure (1)”. In this case, theremaining terminal specifying unit 140 specifies at least “terminal B”and “terminal C” as terminals to which “countermeasure (1)” is notapplicable (remaining terminals).

Then, the operating information specifying unit 120 specifies the typeof operating information corresponding to each countermeasure applicableto the terminals to be managed (S103), and the operating informationacquisition unit 130 acquires, from the terminals to be managed, theoperating information of the type specified by the operating informationspecifying unit 120 (S104). For example, it is assumed that the storageunit stores the terminal-specific countermeasure information of FIG. 3and the definition information of FIG. 4. In this case, the operatinginformation specifying unit 120 specifies that, for the terminal A,“countermeasure (1)” and “countermeasure (3)” are applicable, and thetypes of operating information corresponding to “countermeasure (1)” are“patch application history”, “restart history” and “continuous operatingtime”, and the type of operating information corresponding to“countermeasure (3)” is “usage history of port 1027”. Therefore, theoperating information acquisition unit 130 acquires, for the terminal A,“patch application history”, “restart history”, “continuous operatingtime” and “usage history of port 1027” from the operating information ofthe terminal A.

Then, the prediction unit 150 predicts the number of remaining terminalsat future times based on the operating information acquired by theoperating information acquisition unit 130 (S105). For example, it isassumed that the storage unit stores the terminal-specificcountermeasure information of FIG. 3 and the operating information ofFIG. 5. In this case, for the terminals to be managed other than theremaining terminals specified by the remaining terminal specifying unit140, the prediction unit 150 specifies applicable countermeasures basedon the terminal-specific countermeasure information of FIG. 3, predictsthe timing to apply the applicable countermeasures based on theoperating information of FIG. 5, counts the number of remainingterminals for each future time, and thereby obtains the predictionresults as shown in FIG. 6.

After that, the presentation unit 160 presents the prediction resultspredicted by the prediction unit 150 (S106). The presentation unit 160may present a screen where the prediction results are reflected on thescreen of FIG. 2 as shown in FIG. 7, or may present a screen showing agraph representing the prediction results in chronological order asshown in FIG. 8.

Functional Effects of First Embodiment

As described above, according to the first embodiment, the number ofremaining terminals (remaining risks) at each future time if a selectedcountermeasure is taken is predicted, and prediction results arepresented. Viewing this presentation, a security administrator can grasphow many remaining terminals remain at future times if a certaincountermeasure among a plurality of countermeasures is taken. Thesecurity administrator can thereby determine whether or not toimmediately apply the presented countermeasure and, when a plurality ofcountermeasures are presented, which is the most appropriatecountermeasure. Thus, according to the first embodiment, a securityadministrator can easily develop countermeasures against a securityrisk.

Second Embodiment

The second embodiment is a more concrete version of the firstembodiment.

[System Configuration]

FIG. 11 is a view conceptually showing the system configuration of aninformation processing system 1 according to a second embodiment. Asshown in FIG. 11, the information processing system 1 according to thesecond embodiment includes an information processing device 10, anadministrator terminal 20, and terminals 30 to be managed. Theadministrator terminal 20 is a terminal to be used by a securityadministrator, and it is a stationary PC (Personal Computer), a tabletterminal or the like. The terminals 30 to be managed are not onlycommunication equipment such as a client terminal, a server, a switch ora router on a network but also everything with a function of connectingto a network or a means of communicating through a network (so-calledIoT (Internet of Things)).

[Processing Configuration]

As shown in FIG. 11, the information processing device 10 according tothe second embodiment includes an information acquisition unit 170 inplace of the operating information acquisition unit 130 in the firstembodiment, and further includes a risk investigation unit 180, adisplay processing unit 190, a risk information storage unit 192, aclassification information storage unit 194, and a definitioninformation storage unit 196. Note that the information acquisition unit170 has the same function as the operating information acquisition unit130 and further has other functions described below.

The information acquisition unit 170 acquires terminal information fromeach of the terminals 30 to be managed, and thereby obtains informationas shown in FIG. 12. FIG. 12 is a view showing an example of terminalinformation acquired by the information acquisition unit 170. Theterminal information contains the OS (Operating System) type and the OSversion of the terminal 30 to be managed, various applications installedinto the terminal 30 to be managed and the like, for example. Note that,however, the terminal information is not limited to the information asillustrated in FIG. 12. The information acquisition unit 170 alsoperforms the operation of the operating information acquisition unit 130according to the first embodiment, which is, the operation of acquiringthe operating information of the type specified by the operatinginformation specifying unit 120 from each of the terminals 30 to bemanaged.

The risk investigation unit 180 investigates the terminals 30 to bemanaged having security risks by checking the terminal informationacquired by the information acquisition unit 170 against informationabout security risks provided from each vendor or the like, andgenerates risk information containing the terminal-specificcountermeasure information as shown in FIG. 3. For example, in the casewhere the security risk is the vulnerability A, the risk information mayfurther contain information such as the overview of the vulnerability Aand the description of each countermeasure in addition to theterminal-specific countermeasure information as shown in FIG. 3. Therisk investigation unit 180 stores the generated risk information intothe risk information storage unit 192.

The display processing unit 190 generates a screen to be displayed on adisplay unit (not shown) of the administrator terminal 20 by using therisk information stored in the risk information storage unit 192, andoutputs this screen to the administrator terminal 20. In the secondembodiment, the display processing unit 190 generates a screen thatclassifies and displays the terminals having the vulnerability A asshown in FIG. 14, for example, by using classification information inthe classification information storage unit 194 as shown in FIG. 13, forexample. By using the classification information, it is possible todetermine the tendency of the remaining terminals. FIG. 13 is a viewshowing an example of classification information stored by theclassification information storage unit 194, and FIG. 14 is a viewshowing an example of a screen generated by the display processing unit190. Note that FIG. 14 is an example of a screen in the case where thesecurity risk is the vulnerability A. In the example of FIG. 13, theclassification information storage unit 194 stores terminalidentification information (e.g., MAC address etc.) that identifies eachterminal to be managed and two kinds of classification information(terminal type and priority) in association with each other. To bespecific, the terminals 30 to be managed are first classified into“server” or “client”, and further, the terminals 30 to be managed thatbelong to “client” are classified by priority. The display processingunit 190 generates a screen that classifies (“server” or “client”, and apriority level “high/intermediate/low” for “client”) and displays theterminals 30 to be managed as shown in FIG. 14 by using theclassification information shown in FIG. 13, and displays the screen ona display unit (not shown) of the administrator terminal 20.

A security administrator checks the screen (e.g., the screen of FIG. 14)displayed on the administrator terminal 20, and inputs selection of acountermeasure to be applied against the vulnerability A. A result ofthe input is transmitted to the selection receiving unit 110. Theselection receiving unit 110 receives the selection input for eachclassified category through the screen as shown in FIG. 14, and theremaining terminal specifying unit 140 specifies, for each category, theremaining terminals if a countermeasure selected for each category istaken based on the selection input for each category. Further, theprediction unit 150 predicts, for each category, the number of remainingterminals at future times if a countermeasure selected for each categoryis taken. The prediction unit 150 makes predictions as shown in FIG. 15,for example. FIG. 15 is a view showing an example of prediction resultspredicated by the prediction unit 150. Note that FIG. 15 is an exampleof prediction results in the case where the security risk is thevulnerability A. The prediction results of FIG. 15 are predictionresults in the case where the selection receiving unit 110 receives aninput indicating that, for “server”, “countermeasure (1)”,“countermeasure (2)” and “countermeasure (3)” are selected and, for“client”, “countermeasure (1)” and “countermeasure (2)” are selected inall of the priority levels “high”, “intermediate” and “low”. The exampleof FIG. 15 is an example where the specified number is 0, and theprediction unit 150 predicts the number of remaining terminals inchronological order up to “after three months” when the total number ofremaining terminals becomes 0 or less. To be specific, in the example ofFIG. 15, the total number of remaining terminals is predicted to be 22“after immediate execution”, 13 on the “next day”, 6 “after one week”, 2“after one month”, and 0 “after three months”.

Then, the presentation unit 160 presents a screen that displays thenumber of remaining terminals for each category and the total number ofremaining terminals (“remaining risks after countermeasure”), and apredicted value of the number of remaining terminals for each categoryat future times and a predicted value of the total number of remainingterminals (“remaining risk predicted value”) as shown in FIG. 16, forexample. FIG. 16 is a view showing an example of a screen presented bythe presentation unit 160. Note that FIG. 16 is an example of a screenin the case where the security risk is the vulnerability A. The figurein parentheses in a field in a row of each countermeasure indicates thenumber of terminals 30 to be managed where the vulnerability A iseliminated if the countermeasure corresponding to this row is taken, andit varies according to selection of another countermeasure. For example,regarding “client” with the priority level “high”, while the figure inparentheses in the field in the row of “countermeasure (2)” is “5” inthe screen of FIG. 14, it is “2” in the screen of FIG. 16. This meansthat, if only “countermeasure (2)” is applied, the number of “clients”with the priority level “high” where the vulnerability A is eliminatedis 5, and if “countermeasure (1)” and “countermeasure (2)” are appliedin combination, the vulnerability A is eliminated by applying“countermeasure (1)” in three terminals out of those five terminals, andthe vulnerability A is eliminated by applying “countermeasure (2)” inthe remaining two terminals.

Alternatively, the presentation unit 160 may display a screen showing agraph representing “remaining risk predicted value” for each category ateach future time in chronological order as shown in FIG. 17, instead ofthe screen of FIG. 16. FIG. 17 is a view showing another example of ascreen presented by the presentation unit 160. FIG. 17 is a view showinganother example of a screen presented by the presentation unit 160. FIG.17 is an example of a screen in the case where the security risk is thevulnerability A. Further, although FIG. 17 displays the number ofremaining risks (terminals to be managed in which the vulnerability Aremains) at the present time also, whether or not to display the numberof remaining risks at the present time is not particularly limited.

Note that the screen of FIG. 16 or 17 presented by the presentation unit160 is output to the administrator terminal 20 and displayed on adisplay unit (not shown) of the administrator terminal 20 by the displayprocessing unit 190.

The definition information storage unit 196 stores definitioninformation that defines the correspondence between the type ofoperating information of the terminal 30 to be managed andcountermeasures against security risks (e.g., the definition informationin FIG. 4). The definition information may be delivered from a serverdevice (not shown) to the information processing device 10. Theoperating information specifying unit 120 specifies the type ofoperating information by using the definition information stored in thedefinition information storage unit 196.

[Hardware Configuration]

The information processing device 10 according to the second embodimenthas the same hardware configuration as in the first embodiment. Thestorage 103 further stores a program for implementing the function ofeach processing unit (the information acquisition unit 170, the riskinvestigation unit 180 and the display processing unit 190) according tothe second embodiment, and the processor 101 executes each program andthereby implements each processing unit according to the secondembodiment. Further, the memory 102 and the storage 103 serve also asthe risk information storage unit 192, the classification informationstorage unit 194 and the definition information storage unit 196.

Operation Example

An operation example of the information processing device 10 accordingto the second embodiment is described hereinafter with reference to FIG.18. FIG. 18 is a flowchart showing the process flow of the informationprocessing device 10 according to the second embodiment. An operationexample in the case where the security risk is the vulnerability A isdescribed hereinbelow.

The information acquisition unit 170 acquires terminal information ofeach terminal 30 to be managed in response to a screen display requestfrom the administrator terminal 20, for example (S201). The riskinvestigation unit 180 then investigates the terminals 30 to be managedhaving the vulnerability A and generates risk information based on theacquired terminal information of each terminal 30 to be managed, forexample (S202). The risk investigation unit 180 can specify theterminals 30 to be managed having the vulnerability A and applicablecountermeasures and the like by checking the acquired terminalinformation of each terminal 30 to be managed against information aboutthe vulnerability A provided from each vendor or the like, for example.Note that the processing of S201 and S202 may be performed prior toreceiving a screen display request from the administrator terminal 20.In this case, the following processing of S203 is performed in responseto a screen display request from the administrator terminal 20.

The display processing unit 190 generates a screen that displays resultsof investigating terminals with the vulnerability A (e.g., the screen ofFIG. 14) based on the risk information generated in S202 and theclassification information stored in the classification informationstorage unit 194, and displays this screen on a display unit (not shown)of the administrator terminal 20 (S203). A security administrator whouses the administrator terminal 20 views the content of the displayedscreen, and performs an input operation to select at least one of aplurality of countermeasures. Then, the selection receiving unit 110receives, from the administrator terminal 20, information indicating thecountermeasure selected by the input operation on the administratorterminal 20 (S204). The remaining terminal specifying unit 140 specifiesthe remaining terminals for each category based on the informationindicating the countermeasure selected on the administrator terminal 20and the terminal-specific countermeasure information (S205). Forexample, it is assumed that the risk information storage unit 192 storesthe terminal-specific countermeasure information of FIG. 3, and theselection receiving unit 110 receives an input indicating that“countermeasure (1)” and “countermeasure (2)” are selected for “server”.In this case, the remaining terminal specifying unit 140 specifies atleast “terminal C” as the terminals to which any of “countermeasure (1)”and “countermeasure (2)” cannot be applied (remaining terminals).

Next, the operating information specifying unit 120 specifies the typeof operating information corresponding to the countermeasure applicableto the terminal 30 to be managed (S206), and the operating informationacquisition unit 130 acquires the operating information of the typespecified by the operating information specifying unit 120 from theterminal 30 to be managed (S207). For example, it is assumed that therisk information storage unit 192 stores the terminal-specificcountermeasure information of FIG. 3, and the definition informationstorage unit 196 stores the definition information of FIG. 4. In thiscase, the operating information specifying unit 120 specifies that, forthe terminal A, “countermeasure (1)” and “countermeasure (3)” areapplicable, and the types of operating information corresponding to“countermeasure (1)” are “patch application history”, “restart history”and “continuous operating time”, and the type of operating informationcorresponding to “countermeasure (3)” is “usage history of port 1027”.Therefore, the operating information acquisition unit 130 acquires, forthe terminal A, “patch application history”, “restart history”,“continuous operating time” and “usage history of port 1027” from theoperating information of the terminal A.

Then, the prediction unit 150 predicts the number of remaining terminalsat future times for each category based on the operating informationacquired by the operating information acquisition unit 130 (S208). Forexample, it is assumed that the risk information storage unit 192 storesthe terminal-specific countermeasure information in FIG. 3, and theinformation acquisition unit 170 acquires the operating information inFIG. 5. In this case, for the terminals 30 to be managed other than theremaining terminals specified by the remaining terminal specifying unit140, the prediction unit 150 specifies applicable countermeasures basedon the terminal-specific countermeasure information in FIG. 3, predictsthe timing to apply each applicable countermeasure based on theoperating information in FIG. 5, and counts the number of remainingterminals for each future time. This processing is performed for eachcategory, thereby obtaining the prediction results as shown in FIG. 15.

After that, the presentation unit 160 presents the prediction resultspredicted by the prediction unit 150 (S209). The presentation unit 160may present a screen where the prediction results are reflected on thescreen of FIG. 14 as shown in FIG. 16, or may present a screen showing agraph representing the prediction results in chronological order asshown in FIG. 17.

According to the second embodiment, the same effects as the firstembodiment are obtained.

While the invention has been particularly shown and described withreference to embodiments thereof, the invention is not limited to theseembodiments. It will be understood by those of ordinary skill in the artthat various changes in form and details may be made therein withoutdeparting from the spirit and scope of the present invention as definedby the claims.

For example, in each of the embodiments described above, a button thatcauses each terminal to be managed to carry out a countermeasure basedon selection on a screen may be further placed on the screen. When thisbutton is pressed, the information processing device 10 generates aninstruction that causes each terminal to carry out the countermeasure inaccordance with the selection, and outputs this instruction to eachterminal.

Further, an aspect of presenting the number of remaining terminals atfuture times is described in each of the embodiments described above.Note that, however, an index related to the remaining terminals may bepresented. An example of the index related to the remaining terminals isthe proportion of the number of remaining terminals to the number ofterminals with a security risk, a color corresponding to this proportionor the like, for example.

Further, an aspect of presenting the number of remaining terminals atfuture times in response to a selection input for a countermeasureagainst a security risk is described in each of the embodimentsdescribed above. Note that, however, in the case where the number ofapplicable countermeasures is small, for example, the number ofremaining terminals when all countermeasures are applied regardless of aselection input may be presented from the beginning.

Further, an aspect of reading the terminal-specific countermeasureinformation generated by investigating terminals to be managed inadvance and presenting the number of remaining terminals at future timesbased on the read terminal-specific countermeasure information isdescribed in each of the embodiments described above. Note that,however, the terminal-specific countermeasure information may beacquired by investigating terminals to be managed before presenting thenumber of remaining terminals at future times.

Further, in the second embodiment described above, terminals to bemanaged are first classified into categories of servers or clients, andthen the clients are further classified by priority level. Note that,however, the method of classification is not limited thereto, and onlyclassification into servers or clients may be carried out, orclassification by priority level may be carried out regardless ofservers or clients. Further, classification may be carried out byanother method.

Further, although a plurality of steps (processing steps) aresequentially described in the plurality of flowcharts used in thedescription above, the order of performing the steps to be performed inthe above-described embodiments is not limited to the sequence describedabove. In the above-described embodiments, the sequence of steps shownin the figures may be changed as appropriate. Further, theabove-described embodiments may be combined as long as they are notconflicting.

Further, the whole or part of the embodiments disclosed above can bedescribed as, but not limited to, the following supplementary notes.

Supplementary Note 1

An information processing device comprising:

a selection receiving unit configured to receive an input indicatingselection of at least one countermeasure among a plurality ofcountermeasures applicable to a terminal with a security risk;

an operating information specifying unit configured to specify a type ofoperating information corresponding to a countermeasure applicable tothe terminal by using terminal-specific countermeasure informationindicating a countermeasure applicable to each terminal against thesecurity risk and definition information defining correspondence betweena type of operating information of the terminal and a countermeasureagainst the security risk;

an operating information acquisition unit configured to acquireoperating information of the type specified by the operating informationspecifying unit among the operating information of the terminal;

a remaining terminal specifying unit configured to specify remainingterminals where the security risk remains when the countermeasurereceived by the selection receiving unit is applied based on theterminal-specific countermeasure information;

a prediction unit configured to predict the number of the remainingterminals at a future time based on the operating information acquiredby the operating information acquisition unit; and

a presentation unit configured to present prediction results predictedby the prediction unit.

Supplementary Note 2

The information processing device according to Supplementary Note 1,wherein

the prediction unit predicts the number of the remaining terminals atfuture times in chronological order, and

the presentation unit presents a graph showing the number of theremaining terminals at future times in chronological order.

Supplementary Note 3

The information processing device according to Supplementary Note 2,wherein the prediction unit predicts the number of the remainingterminals in chronological order up to a future time when the number ofthe remaining terminals becomes equal to or less than a specifiednumber.

Supplementary Note 4

The information processing device according to any one of SupplementaryNotes 1 to 3, further comprising:

a classification information storage unit configured to storeclassification information that classifies the terminals intocategories, wherein

the prediction unit predicts the number of the remaining terminals at afuture time for each category of the terminals.

Supplementary Note 5

An information processing method performed by an information processingdevice, the method comprising:

a step of receiving an input indicating selection of at least onecountermeasure among a plurality of countermeasures applicable to aterminal with a security risk;

a step of specifying a type of operating information corresponding to acountermeasure applicable to the terminal by using terminal-specificcountermeasure information indicating a countermeasure applicable toeach terminal against the security risk and definition informationdefining correspondence between a type of operating information of theterminal and a countermeasure against the security risk;

a step of acquiring operating information of the specified type amongthe operating information of the terminal;

a step of specifying remaining terminals where the security risk remainswhen the received countermeasure is applied based on theterminal-specific countermeasure information;

a step of predicting the number of the remaining terminals at a futuretime based on the acquired operating information; and

a step of presenting the predicted results.

Supplementary Note 6

The information processing method according to Supplementary Note 5,wherein

the prediction step predicts the number of the remaining terminals atfuture times in chronological order, and

the presentation step presents a graph showing the number of theremaining terminals at future times in chronological order.

Supplementary Note 7

The information processing method according to Supplementary Note 6,wherein the prediction step predicts the number of the remainingterminals in chronological order up to a future time when the number ofthe remaining terminals becomes equal to or less than a specifiednumber.

Supplementary Note 8

The information processing method according to any one of SupplementaryNotes 5 to 7, further comprising:

a step of storing classification information that classifies theterminals into categories, wherein

the prediction step predicts the number of the remaining terminals at afuture time for each category of the terminals.

Supplementary Note 9

A non-transitory computer readable medium storing a program causing acomputer to execute:

a step of receiving an input indicating selection of at least onecountermeasure among a plurality of countermeasures applicable to aterminal with a security risk;

a step of specifying a type of operating information corresponding to acountermeasure applicable to the terminal by using terminal-specificcountermeasure information indicating a countermeasure applicable toeach terminal against the security risk and definition informationdefining correspondence between a type of operating information of theterminal and a countermeasure against the security risk;

a step of acquiring operating information of the specified type amongthe operating information of the terminal;

a step of specifying remaining terminals where the security risk remainswhen the received countermeasure is applied based on theterminal-specific countermeasure information;

a step of predicting the number of the remaining terminals at a futuretime based on the acquired operating information; and

a step of presenting the predicted results.

Supplementary Note 10

The non-transitory computer readable medium according to SupplementaryNote 9, wherein

the prediction step predicts the number of the remaining terminals atfuture times in chronological order, and

the presentation step presents a graph showing the number of theremaining terminals at future times in chronological order.

Supplementary Note 11

The non-transitory computer readable medium according to SupplementaryNote 10, wherein the prediction step predicts the number of theremaining terminals in chronological order up to a future time when thenumber of the remaining terminals becomes equal to or less than aspecified number.

Supplementary Note 12

The non-transitory computer readable medium according to any one ofSupplementary Notes 9 to 11, wherein the program causes the computer tofurther execute:

a step of storing classification information that classifies theterminals into categories, wherein

the prediction step predicts the number of the remaining terminals at afuture time for each category of the terminals.

This application is based upon and claims the benefit of priority fromJapanese patent application No. 2016-067734 filed on Mar. 30, 2016, thedisclosure of which is incorporated herein in its entirety by reference.

REFERENCE SIGNS LIST

-   1 INFORMATION PROCESSING SYSTEM    -   10 INFORMATION PROCESSING DEVICE        -   101 PROCESSOR        -   102 MEMORY        -   103 STORAGE        -   104 INPUT/OUTPUT INTERFACE        -   1041 DISPLAY DEVICE        -   1042 INPUT DEVICE        -   105 COMMUNICATION INTERFACE        -   110 SELECTION RECEIVING UNIT        -   120 OPERATING INFORMATION SPECIFYING UNIT        -   130 OPERATING INFORMATION ACQUISITION UNIT        -   140 REMAINING TERMINAL SPECIFYING UNIT        -   150 PREDICTION UNIT        -   160 PRESENTATION UNIT        -   170 INFORMATION ACQUISITION UNIT        -   180 RISK INVESTIGATION UNIT        -   190 DISPLAY PROCESSING UNIT        -   192 RISK INFORMATION STORAGE UNIT        -   194 CLASSIFICATION INFORMATION STORAGE UNIT        -   196 DEFINITION INFORMATION STORAGE UNIT    -   20 ADMINISTRATOR TERMINAL    -   30 TERMINAL TO BE MANAGED

1. An information processing device comprising: a selection receivingunit configured to receive an input indicating selection of at least onecountermeasure among a plurality of countermeasures applicable to aterminal with a security risk; an operating information specifying unitconfigured to specify a type of operating information corresponding to acountermeasure applicable to the terminal by using terminal-specificcountermeasure information indicating a countermeasure applicable toeach terminal against the security risk and definition informationdefining correspondence between a type of operating information of theterminal and a countermeasure against the security risk; an operatinginformation acquisition unit configured to acquire operating informationof the type specified by the operating information specifying unit amongthe operating information of the terminal; a remaining terminalspecifying unit configured to specify remaining terminals where thesecurity risk remains when the countermeasure received by the selectionreceiving unit is applied based on the terminal-specific countermeasureinformation; a prediction unit configured to predict the number of theremaining terminals at a future time based on the operating informationacquired by the operating information acquisition unit; and apresentation unit configured to present prediction results predicted bythe prediction unit.
 2. The information processing device according toclaim 1, wherein the prediction unit predicts the number of theremaining terminals at future times in chronological order, and thepresentation unit presents a graph showing the number of the remainingterminals at future times in chronological order.
 3. The informationprocessing device according to claim 2, wherein the prediction unitpredicts the number of the remaining terminals in chronological order upto a future time when the number of the remaining terminals becomesequal to or less than a specified number.
 4. The information processingdevice according to claim 1, further comprising: a classificationinformation storage unit configured to store classification informationthat classifies the terminals into categories, wherein the predictionunit predicts the number of the remaining terminals at a future time foreach category of the terminals.
 5. An information processing methodperformed by an information processing device, the method comprising: astep of receiving an input indicating selection of at least onecountermeasure among a plurality of countermeasures applicable to aterminal with a security risk; a step of specifying a type of operatinginformation corresponding to a countermeasure applicable to the terminalby using terminal-specific countermeasure information indicating acountermeasure applicable to each terminal against the security risk anddefinition information defining correspondence between a type ofoperating information of the terminal and a countermeasure against thesecurity risk; a step of acquiring operating information of thespecified type among the operating information of the terminal; a stepof specifying remaining terminals where the security risk remains whenthe received countermeasure is applied based on the terminal-specificcountermeasure information; a step of predicting the number of theremaining terminals at a future time based on the acquired operatinginformation; and a step of presenting the predicted results.
 6. Theinformation processing method according to claim 5, wherein theprediction step predicts the number of the remaining terminals at futuretimes in chronological order, and the presentation step presents a graphshowing the number of the remaining terminals at future times inchronological order.
 7. The information processing method according toclaim 6, wherein the prediction step predicts the number of theremaining terminals in chronological order up to a future time when thenumber of the remaining terminals becomes equal to or less than aspecified number.
 8. The information processing method according toclaim 5, further comprising: a step of storing classificationinformation that classifies the terminals into categories, wherein theprediction step predicts the number of the remaining terminals at afuture time for each category of the terminals.
 9. A non-transitorycomputer readable medium storing a program causing a computer toexecute: a step of receiving an input indicating selection of at leastone countermeasure among a plurality of countermeasures applicable to aterminal with a security risk; a step of specifying a type of operatinginformation corresponding to a countermeasure applicable to the terminalby using terminal-specific countermeasure information indicating acountermeasure applicable to each terminal against the security risk anddefinition information defining correspondence between a type ofoperating information of the terminal and a countermeasure against thesecurity risk; a step of acquiring operating information of thespecified type among the operating information of the terminal; a stepof specifying remaining terminals where the security risk remains whenthe received countermeasure is applied based on the terminal-specificcountermeasure information; a step of predicting the number of theremaining terminals at a future time based on the acquired operatinginformation; and a step of presenting the predicted results.
 10. Thenon-transitory computer readable medium according to claim 9, whereinthe prediction step predicts the number of the remaining terminals atfuture times in chronological order, and the presentation step presentsa graph showing the number of the remaining terminals at future times inchronological order.
 11. The non-transitory computer readable mediumaccording to claim 10, wherein the prediction step predicts the numberof the remaining terminals in chronological order up to a future timewhen the number of the remaining terminals becomes equal to or less thana specified number.
 12. The non-transitory computer readable mediumaccording to claim 9, wherein the program causes the computer to furtherexecute: a step of storing classification information that classifiesthe terminals into categories, wherein the prediction step predicts thenumber of the remaining terminals at a future time for each category ofthe terminals.